Oil filter and mounting therefor



July 14, 1942. A. J. ROOT OIL FILTER AND MOUNTING THEREFOR Filed Dec. 4, 1959 INVENTOR Arf/z J. Roof.

ATTORNEY Patented July l4, W42

on. FILTER AND MOUNTING rnsnnron Arthur J. Root, Quapaw: Okla. Application December 4, 1939, Serial No. 307,455 2 Claims. '(o1.21c-131) This invention relates to oil filters of the type illustrated in my copending application, Serial No. 290,805, filed August 18, .1939, and which is adapted for association withthe ventilating system of the crank-case of an engine on which the filter is installed. I

The filter covered in my copending application is mounted directly upon and carried by the oil filler and breather connection of the engine, however, I have found that in many engines there is not sufilcient room to mount the filter on this connection.

It is, therefore, a principal object of the present invention to providea; filter construction and a universal mounting therefor so that the oil outlet is readily connectable with the oil filler and breather connection and the returned oil is contacted with air passing into the crank-case.

It is also an object of the invention to provide a filter mounting wherein the filtering unit is readily removable for replacement without detaching the filter,

In accomplishing these and other objects oi. the invention, as hereinafter pointed out, I have provided improved details of structure, the pre- Ierred form of which is illustrated in the accompanying drawing, wherein:

Fig. l is a perspective view er a portion of a well known motor vehicle engine equipped with a filter and filter mounting embodying the flea-= tures of the present invention.

Fig. 2 is an elevational view of the litter and mounting, the oil outlet, and a portion of the mounting bracket being shown in section.

Fig. 3 is a longitudinal section. through, the

filter and its telescoping connection with the oil filler and breather tube.

Fig. 4 is a plan view of the mounting bracket.

Fig. .5 is a sectional view through the upper portion of a modified form of the invention.

Referring more in detail to the drawing:

I designates a well known type of internal combustion engine having an oil filler and breath er connection 2 projecting above and located between the cylinder heads 3 and it, and which leads downwardly to the interior of the crank-case 5. Because of the location of the conntion and the relative closeness of the fuel pump t, it is difficult to mount a filter directly upon the coin nection 2, as in the instance of the filter disclosed 'in the above mentioned application. I

have, therefore, provided a universal mounting and a filter constructionrwhereb-y the filter is located in a conveniently accessible position and tion to give the advantages of the filter as detill connected with the breather and filler connectit scribed in my copending application.

The filter includes a casing l, having a preferably cylindrical wall it, a bottom 9, and an open top iii normally closed by a cover ii. Formed the side wall of the casing, at a point just below the rim of the opening ill, is an elongated horizontally arranged opening H, as clearly shown in Figs. 2 and 3 to provide an oil outlet and flow passage for air that is drawn into the crank-case through the connection 2, as later described.

The bottom t is provided with a preferably centrally arranged opening l3 for receiving the threaded neck it of a check valve l5 forming a connection it for an oil supply pipe ll, the pipe it being connected with the pressure side of the oil circulatory system and forming a bypass for passing a portion of the oil through the filter to be returned to the crank-case through the connection 2. The check valve l5 normally seats on drop in oil pressure to prevent return flow of the lay-passed oil and foreign matter removed by the filtering media [8.

in the illustrated instance the filtering media is shown as being supported above the bottom of the filter casing on an apertured grid l9 carried upon lugs 20 projecting inwardly from the wall it, thereby providing an inlet chamber '2l coextensive with the area of the filtering media.

The filtering media 88 may be in any approved cartridge form or a body of cotton waste 22 superimposed by a felt pad 23 which is retained against the waste and below the lower edge {it 'oi'the oil outlet by an apertured grid plate tit, similar in construction to the grid IS). The grid plate it has a central boss 26, carrying an upwardly directed stem 21 terminating in a threaded end 28 by which the cover It is secured on the rim of the casing wall 8.

The cover It preferably includes a crowned dislr portion it having 2. depending flange 30 engaging over the rim of the casing and cooperating with a shoulder 3! to seat a gasket 32. The

position by a spring clamp 34, which includes a rounded fulcrum portion seated on the grid plate and having a finger 36 engaged under a rib ti on a web 38 extending inwardly from the rim of the casing. The clamp also includes a handle portion 39 by which the finger 36 may 'be rocked into engagement with the rib 37. With the clamp in position the cover may be secured by a wing nut ll threaded on the projecting end of the stem 21.

i In order that the air drawn into the crankcase may be passed through the outlet chamber ll of the filter, the'cover is provided with an air inlet opening 42 encircled by a collar II which receives the neck 44 of the conventional breather j cap that was previously mounted directly on the connection 2.

The filter moimting bracket includes a plate portion 4! conforming to the shape of the filter bottom I, and an arcuaie fiange portion 41 cooperating therewith to form a seat in which the .filter is supported.- The sides ll oft-the fiange portion ll terminate at'opposite diametrical sides or the filter casing in laterally extending ears 4!. and II to attach a strap ll which ooacts with the fiange 41 to encircle the bodyoi'thecaslng. The strap ll hassimilarears l2 and 63 through which fastening devices I4 and II are extended into threaded sockets in the ears 4? and II. The bracket also includes depending legs I! and 51 by which the bracket is attached to the engine. For example, the leg I! is in the form of an elongated fiange and terminates in a 7 foot as provided with spaced. Openings u and to through which the cylinder head studs I are extended. The other; leg serves principally as a brace and terminates in a foot I having an opening "4 therein through which is passed one of the iastening' device I securing the manifold I.

1 'l -ne leg portions oi the bracket are preferably formed or bendable material so that they may be adjusted to fit the various places or attachment or the respective engines on which the-filters may b l-fil ed.

Formed about the elongated outlet opening I! Q is a boss 01 to which is-secured'the fiange n or an outlet tube I. The inlet end or the tube 8. corresponds. ln sh pe to that of the opening, but its discharge end terminates in adownwardly inwarmgzone oi the crank-case remain as vapors and are carried out through the usual ventilating opening in the crank-case as in conventional practice.

In the form of the invention shown in Fig. 5, the breather cap is in the form of a dome 18 connected with the interior of the filter casing through a neck 19 which is covered by a screen- The dome 18 projects circumrerentially oi the neck It and the under part of the projecting portion is provided with air inlet openings 8|. The

interior of the dome is filled with a filtering media 82 so that the air drawn into the crank-case is relieved of dust, dirt, and other foreign material prior to contact of the air with the oil. Otherwise the filter construction and mounting are the same as that illustrated in the preferred form of the invention. d

From the foregoing it is obvious that I have 20 provided a simple filter construction that is adapted for universal mounting and readily connected withthe filler and breather connection or anintemal combustion engine.

What I claim and desire to secure by Letters Patent is:

l. In-combination with the air inlet connection of the ventilating system 01- an internal 1 combustion engine, a filter casing, means supporting the filter casing on the engine in laterally spaced relation with said air inlet connection. a filtering element supported in the casing and arranged therein to provide an oil inlet space below the filtering element and an airspace ,above the filtering element, said filter casing having an oil inlet to the oil inlet space. an air inlet to the air space and a lateral oh and air outlet from said air space, and an L-shaped duct having a vertical leg connected with the air inlet connection and a lateral leg connected with 40 the air and oil outlet of said casing whereby air is supplied to the air inlet connection or the ventilating system through said air space and in elinedtube portion 1a telescoped within a tubular branch II or an L-shaped tube 12, the other branch I8 oi which sleeves within the collar l4 -or.the connection I, as shown in Fig. 3. With'this arrangement the telescoping connection provides sweeping contact with filtered oil flowing through the lateral outlet opening and lateral leg 01' said .45 duct to the air inlet connection or the ventilating system.

entrained with thes'oil. The oil, after passing The evaporated liquid diluents on entering the 2. In combination with the air inlet connection of the ventilating system of an in'ternal combustion engine, a filter casing, means supporting the filter casing on the engine in laterally spaced relation with said air inlet connection, a filtering element supported in .the casing and arranged therein to provide an oil inlet space below the filtering element and an air space above the filtering element, said filter casing having an .oil

inlet to the oil inlet space, an air inlet to the air space and a lateral oil and air outlet from said air space, an L-shaped duct having a vertical leg connected with the air inlet connection and a through t mt m and t upper grid plgte, lateral leg connected with the air and oil outlet news in a thin film through the outlet I: through of sa d casing whereby air is supplied to the air thec ecting tubes andisreturnedtothecrankinlet connection or the ventilating system case L way of the connection I. Simultaneously 8h5 p e n in S p Contact with now or oil air is-drawn through the breather with filtered oil flowing through the lateral outcap ll and into intimate contact with the oil belet opening and lateral leg of said duct to the iris' returned to the crank case. This contact or air inlet connection 01 the generating system, the air causes evaporation of any liquid diluents said lateral leg or the duct comprising telescop- V that are carried with the oil through the filter -ing sections, and means sealing the joint be- .media so that by the time the oil is returned to tween said sections.

the crank-case it is relieved 01' foreign material. 7 ARTHUR J. noo'r. 

